everyone, even russia warned syria not to do it. now you see this exclusive to cnn. our camera crew inside syria got dangerously close to a chemical weapons production plant. the syrian government doesn't us to see this. they make that very clear. we want you to watch this report from arwa damon. >> reporter: in most of these villages we don't dare stop. while no longer fully controlled by the government, the regime spies still lurk, and we're sneaking our way towards a facility the government most certainly does not want us to see. a site that multiple sources on the ground say is where the assad regime produces chemical weapons called the scientific research facility. to the southeast of aleppo lies the town of al scattered safari. on the outskirts a sprawling factory manufacturing anything from containers to long-range missiles. this is as close as we can get before we hear an aircraft overhead and quickly leave. to the southeast of that, aaccoacco according to our sources, is the scientific veerch fa simt. we can see the outer most perimeter of the general resear